Document Detail


Usefulness of the whole-blood interferon-gamma release assay for diagnosis of extrapulmonary tuberculosis.
MedLine Citation:
PMID:  19070449     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The whole-blood interferon-gamma enzyme-linked immunosorbent assay (QuantiFERON-TB Gold [QFT-G]; Cellestis, Carnegie, Australia) has been studied mainly for diagnosing active pulmonary tuberculosis (TB) or latent TB. We prospectively evaluated its diagnostic usefulness in patients suspected with extrapulmonary TB (EP-TB). Of the 100 adult patients with suspected EP-TB, 43 were classified as "confirmed" EP-TB and 5 as "probable" EP-TB. Of the 48 with EP-TB, 27 (56%) were diagnosed with TB lymphadenitis and 11 (17%) with skeletal TB. The overall sensitivity and specificity of the assay were 69% (95% confidence interval [CI(95)], 53-81%) and 82% (CI(95), 69-91%), respectively. Among 44 patients presented with cervical lymphadenopathy, the QFT-G assay showed 86% (CI(95), 64-97%) sensitivity and 87% (CI(95), 66-97%) specificity, whereas in 28 with skeletal involvement, the sensitivity and specificity of the assay were 45% (CI(95), 17-77%) and 81% (CI(95), 54-96%), respectively. These suboptimal diagnostic performances suggest that the QFT-G assay alone is not sufficient for the diagnosis of EP-TB.
Authors:
Kyoung-Ho Song; Jae Hyun Jeon; Wan Beom Park; Sung-Han Kim; Kyoung Un Park; Nam Joong Kim; Myoung-don Oh; Hong Bin Kim; Kang Won Choe
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Publication Detail:
Type:  Journal Article     Date:  2008-12-12
Journal Detail:
Title:  Diagnostic microbiology and infectious disease     Volume:  63     ISSN:  1879-0070     ISO Abbreviation:  Diagn. Microbiol. Infect. Dis.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-01-19     Completed Date:  2009-08-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8305899     Medline TA:  Diagn Microbiol Infect Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  182-7     Citation Subset:  IM    
Affiliation:
Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aged
Aged, 80 and over
Enzyme-Linked Immunosorbent Assay / methods*
Female
Humans
Interferon-gamma / blood*
Male
Middle Aged
Mycobacterium tuberculosis / genetics,  isolation & purification
Polymerase Chain Reaction
Predictive Value of Tests
Reagent Kits, Diagnostic
Sensitivity and Specificity
Tuberculosis / diagnosis*,  immunology*,  microbiology
Tuberculosis, Lymph Node / diagnosis,  immunology,  microbiology
Chemical
Reg. No./Substance:
0/Reagent Kits, Diagnostic; 82115-62-6/Interferon-gamma

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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